Banded Jasper (possibly "Picture Jasper")
Jasper (a microcrystalline variety of Quartz / Silicon Dioxide - SiO2)
Sedimentary rock (specifically a chemical sedimentary rock, or a chert if considered purely mineral aggregate)
Category
Man Made Glass (Often Grouped With Minerals In Lapidary)
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Chert (Jasper)
Silicon dioxide (SiO2) with impurities
sedimentary
Beach Pebble / Agate-bearing Chert Pebble
Microcrystalline Quartz (SiO2) with Inclusion Minerals
sedimentary
Sandstone
Clastic Sedimentary Rock
sedimentary
Milky Quartz with Hematite inclusions
Silicon Dioxide (SiO2) with Iron Oxide (Fe2O3) inclusions
mineral
Blue Quartz (Blue Aventurine)
Silicon Dioxide (SiO2) with inclusions of Dumortierite or Crocidolite
metamorphic
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Clear Quartz (Tumbled)
Silicon Dioxide (SiO2)
mineral
Granite
Granite (a common rock type, not a single mineral with a formula. Composed primarily of quartz, feldspar, and mica/amphibole).
igneous
Fluorite
Fluorite (Calcium Fluoride, CaF2)
mineral
Jasper
Microcrystalline Quartz (SiO2)
Sedimentary/Mineral
Amethyst
SiO2 (Silicon Dioxide with Iron impurities)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Quartz (Crystal Point/Fragment)
Silicon Dioxide (SiO2)
mineral
Chert with Quartz Veining
Microcrystalline Silica (SiO2)
sedimentary
Quartz (Smoky Quartz / Chalcedony)
Silicon Dioxide (SiO2)
mineral
Fluorite (specifically Blue John or Banded Fluorite)
Calcium Fluoride (CaF2)
mineral
Quartz (River Pebble)
Silicon Dioxide (SiO2)
mineral
Petrified Wood
Silicified Wood (SiO2)
sedimentary
Yellow Aventurine
Silicon Dioxide (Quartz with inclusions of Mica or Pyrite), SiO2
metamorphic
Green Jasper / Green Quartz
Silicon dioxide (SiO2) with mineral impurities
sedimentary
Garnet
Garnet Group (Silicate mineral); general formula X3Y2(SiO4)3
mineral
Yellow Quartz (Citrine/Yellow Jasper mix)
Silicon Dioxide (SiO2)
mineral
Citrine
Silicon Dioxide (SiO2)
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Serpentine Schist with Quartz Vein
Serpentine Schist (a type of Metamorphic rock). The white band is likely Quartz (SiO2).
Metamorphic
Quartz
Silicon dioxide (SiO2)
Mineral
Plum Blossom Tourmaline
Tourmaline with Lepidolite (Na,Ca)(Li,Mg,Al)3Al6(BO3)3Si6O18(OH)4
igneous
Moonstone
Potassium Aluminum Silicate (KAlSi3O8) with inclusions of Albite
mineral
Aventurine (Green Quartz)
Silicon dioxide with inclusions (SiO2 + K(Al,Cr)2AlSi3O10(OH)2)
mineral
Copper Ore with Chrysocolla and Azurite
Cu2-xAlx(H2-xSi2O5)(OH)4·nH2O (Chrysocolla) / Cu3(CO3)2(OH)2 (Azurite)
mineral
Jasper
Jasper (Silicon Dioxide, SiO2)
sedimentary
Biotite Mica
Biotite, K(Mg,Fe)3AlSi3O10(F,OH)2
mineral
Rose Quartz
Silicon Dioxide (SiO2) with trace Titanium, Manganese or Iron
mineral
Chert (Green)
Silicon Dioxide (SiO2)
sedimentary
Quartz (Smoky/Milky Variety)
Silicon Dioxide (SiO2)
mineral
Quartz with inclusions
SiO2
mineral
Blue Quartz
Silicon Dioxide (SiO2) with fibrous inclusions (such as tourmaline, magnesio-riebbeckite, or crocidolite)
mineral
Serpentine
Serpentinite (rock), Serpentine group minerals (e.g., Antigorite, Lizardite, Chrysotile)
Metamorphic rock
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Garnet
Garnet Group (often Pyrope or Almandine); X3Y2(SiO4)3
mineral